Double-drum hoist



March 9 1926. 1,575,914

C. C. HANSEN DOUBLE DRUM HOIST Filed Oct. 10 925 v Z SheetS-Sheet l INVENTOR. vb Q g E fij'zuvled (Ulbnsen 4270 {HEY 1,575,914 C. C. HANSEN B'UBLE DRUM HCIST Filed 10, 1925 2 Sheets$heet 2 March 9,1926.

I lNVEN-ToR; (Zanled (2210:: 51m

A VVVQ Patented Mar. 9, 192%.

pairs stares CHARLES C. HANSEN, OF EASION, PENNSYLVANIA, ASSIGNOR T0 INGEBSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A GORPORATIQN 01* NEW JERSEY.

, DOUBLE-DRUM HOIST.

Application filed October 10, 1925. Serial No. 61,635.

To all whom it may concern:

Be it known that I, CHARLES C. HANSEN, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain Double-Drum Hoist, of which the following is a specification accompanied by drawings. I

This invention relates to hoists, but more particularly to power driven hoists of the double drum type in which either of the drums may be driven from a common driving element. I

In the type of hoist for which the present invention is contemplated, the drums, commonly termed the haulage and tail rope drums, are usually mounted side by side,

'and are preferably mounted loosely upon their bearings so that they may rotate in opposite directions. This is especially desirable in hoists of the type illustrated in the drawings. Usually in this type of hoist an end of asingle rope or cable is secured to each of the drums and the load is secured to the loop thus formed. It is therefore desirable that the drum carrying the tail rope rotate freely to unwind the rope while the other drum is winding upthe rope.

In view of the foregoing facts, the means for connecting the drums with the driving element should respond instantly and in a positive manner upon reversal of the driving element in either direction.

The objects of the invention are to insure a positive driving connectionbetween either of the drums and the driving element and to simultaneously disconnect the other drum from the driving element in accordance with the direction of rotation of the driving element.

in part pointed out hereinafter.

The invention consists of the combinations of elements, features of construction and an rangement of parts having the general mode Figure2 is a transverse sectional View,

through Figure 1 on the line 2- 2 looking in the direction of the arrows, and

Other objects will be in part obvious and Figure 3 is a view similar toFigure 2 on the line 3-3 of Figure ,1 looking in the direction ofthe arrows, showing one of the pawls in engagement with one of the opposed drum drivers.

Referring to the drawings, A indicates a base plate on one end of which is mounted a frameB and on the opposite end a motor 0. The base plateA is preferably swivelled on a bed plateD andis held uponsaidbed plate by a bolt E which may also serve as a pivot for thebase plate A; The motor C may be of any suitableand compact type, but in this instance a fluid actuated motor of the flat piston type, commonly termed the Dake-niotor, is indicated. Fressure fluid for actuating the motor'is introduced into a valve chestF through a suitable connection G and the distribution of'the pressure fluid may be controlled by any suitable throttle valve (not shown) located in the valve chest;

F. A throttle lever H connected operatively to the throttle valve serves as a convenient means for manipulating the valve and for reversing the direction of the motor.

In this instance a center bearing J extends longitudinally of the hoist and is supported at one end by the frame B and suitably secured thereto by means of-screws K. The opposite end ofthe center bearing a J has formed integrally therewith a plate or.

flange L secured to the motor 0 by screws 0 and which plate serves as a side plate for the motor. 1'

Extending through the center bearing J is a main driving shaft P connected at one end to the motor to be rotated thereby. The other end of the driving shaft P is supported within a plate Q, and is provided with an anti-friction bearing. R. In addition to forming a support for one end of the driving shaft P, the plate Q also acts as a cover for a gear casing S which in this instance is formed integrally with the frame Arranged within the gear'casing S is an intermediate gear T mounted on a stationary shaft U which is supported by the plate Q. The intermediate gear T in this instance is provided with anti-friction bearings V and W and meshes with a driving pinion X keyed to the driving shaft preferably between the bearing E aiid the frame I tn intermediategpiiiioii, preferably formed integrally with the intermediate T ii in tends beyond the geat casing Sand meshes with an internal gear. Z mounted rotatably onthe center bearing J and adjacent the radial teeth, preferably formed integrally with the drum. A similar druni driver is formed on the drum 0: The engagingfaces of the drum drivers 6 and f are opposed with respect to eachother for reasons which will be explained hereinafter. V

Iii-OIClGf to selectively "engage or connect one or the other of thedrumsuc and cl to be driven by the driving sliaftP, a main driverg is keyed to the extension b'to rotate between the inner faces of said drums: In this instance, the main driver gls mounted eccentrically upon the extension 6 and forms i a bearing for a sleeve h which is mounted 25 rotatably tliereoin In this instance the sleeve it has formed integrally therewithia pair of pawls j and 7c having a face 0 for engaging the drum drivers 6 and f of the drums (l and a respectively. The pawls j and 7c are formed onop'posite faces of the sleeve hso thatthe pawl j may engage the drum driver 7 andthe pawl is may engage the drum driher e. In order to insure positive engagement of the pawls j and ]t' with their respective drum drivers, an iarc'uate' key slot 9 1s formed in the sleevel h to cooperate with a' stop or key 9 for limiting rotation of the sleeve 71. with respect to the main driver 9; r The pawls y and 7a are pier erably offset from the median line of the sleeve htoward which they incline so that the engaging faces 0 of said pawl's are substantially in line with said median line. By thus offsetting the pawls; as described, the

sleeve it will be unbalanced and will there fore always tend to swing toward the position illustrated in Figure 3.-

Siiita'ble means are provided for retarding or preventing rotation of the drums after they have been disconnected from the driving element; To this end a brake in the form of a band 1' encircles a f'flange s of the drum cl and is provided with a suitable device as at t for tightening said band. Similarly a band 1 is arranged about the flange u of the drum (Z and like the band 9 on1the flange s is also provided with suitable means icir manipulating said band. Since the braking element herein shown together with its operation is well-known, further description thereof is considered u'nnecessary. y

In the operation of thehoist, let it be assumed that the motor C its-being? actuated to rotate the shaft P in the direction of the arrow adjacent said shaft in Figure 3. With the shaft P rotating in this direction, the train of gearing in the gear casing S together with the internal gear Z will cause the main driver to rotatein a direction op JOSlt-G tO that in which the driving shaft is eing rotated. Assuming then that the sleeve i is in the position shown in Figure 2,

-j. and. is will bemoved into engagement with their respective drum drivers, depending upon the direction of rotation of the main driver. M a

Uponreversal of the motor the direction of the rotation of the driving shaft P and the train of gearing in the gear casing S together with the main driver 9 will accordingly be caused to rotate in an opposite direction to that requiredfor driving the haulage drum-d; At the instant o reversal the pawl twill be rocked out of engagement from the drum driver 6 anddue to they eccentric motion ofthe main drlver g, the

pawl 9' will be carried into engagement with the drum '0 and thus connect the drum to be rotated in the direction of rotation of theinain driver.

The pawls may be rocked into a neutral position in case it be desired to disengage both drums so that the cable or rope may be simultaneously unwound from both drums, but; the clearance may be eliminated if desired, so that there is no neutral position.

.Iclaim: I

1. In a hoist, the combinationeta base plate; a frame on one end of the base plate,

a reversible motor at the opposite end of the base plate, a main driving shaft connected to be rotated by the motor, a center 115 bearing encircling thedriving shaft, drums rotatable about the center bearing; an eccentric main driver connected to be rotated by the driving shaft and rotatable about and means mounted rothe center bearing, tatably about the main driver for connect ing' the main driver with one or the other of the drums in accordance with the direction of rotation of the main driver.

2. In a hoist, the combination of a base platee frame on one end, of the base plate, a reversible motor at; the opposite .end of the base late,- a main driving shaft connected to e rotated by the motor a center so a bearing encimlingthe driving shaft, drums rotatable about the center bearing, an ec bra centric main driver connected to be rotated by the drivingshaft, said eccentric main driver being rotatable about the center bearing, and means including a sleeve and pawls rotatable on the eccentric main driver whereby one or the other of said pawle are actuated into engagement with one or the other of said drums in accordance with the direction of rotation of the main driver. i

3. In a hoist, the combination of a base plate, a frame on one end of the base plate, a reversible motor at the opposite end of the base plate, a main driving shaft connected to be rotated by the motor, a center bearing encircling the driving shaft and supported by the frame and the motor, drums rotatable about the center bearing, opposed drum drivers on said drums, an eccentric main driver connected to be rotated by the driving shaft, said eccentric main driver being rotatable about the center bearing and the driving shaft, a sleeve carryingopposed pawls mounted rotatably on the eccentric main driver whereby one or the other of the opposed pawls may be actuated into engagement with one or the other'of the opposed-drum drivers in accordance with the direction of rotation of the main'driver.

In testimony whereof I have signed this specification.

I-IARLES G. HANSEN. 

